JP5216999B2 - Drive unit for movable furniture parts - Google Patents

Description

  The invention relates in particular to a drive device for a movable furniture part, such as a drawer, with a discharge device, the position of the furniture part movable using this discharge device being at least partially open from a closed position. As well as having at least one sensor with which the movement of the discharge device can be started.

  A discharge device for movable furniture parts is known from German utility model publication DE 20 2004 007 168 U1, in which a pressing device in the form of a pin is used as a movable furniture part. Applied. The pin is coupled to the part whose position is detected by the sensor. In addition, when a switch is provided and a movable furniture part is pressed, the switch is triggered and the discharge process is triggered. This solution has the disadvantage that the installation of the switch in the ejector must be carried out very accurately in order to avoid inaccurate triggering. This is particularly difficult for furniture that usually has some large tolerances.

  One piece of furniture disclosed in the Austrian patent publication AT 2004 01379 A5 has a discharge device having a lever with a contact switch. When a certain position of the lever is reached, the contact switch can be triggered, causing the movable furniture part to be ejected from the furniture body. However, it has been found that setting and determining the switching point is relatively difficult and a malfunction occurs easily.

  Accordingly, it is an object of the present invention to provide a drive for a movable furniture part that allows automatic ejection of the movable furniture part and compensates for its tolerances.

  This object is achieved by a drive device having the features of claim 1.

  According to the invention, at least one sensor comprises a feeler applied to a furniture part movable in at least a closed position, the movement of the furniture part starting the discharge device being detectable by the feeler. ing. The function of detecting the position and / or movement of the furniture part is well separated from the mechanical function of discharging the furniture part, so that both elements, i.e. the sensor and the discharge device can be mounted separately from each other. it can. Thus, there is no switching point as defined above, which requires a particularly accurate setting of the position of the discharge device for movable furniture parts. Rather, the sensor can present some tolerance compensation and positioning is independent.

  According to a preferred design of the invention, the movement of the feeler can be detected via the neutral position of the sensor in a certain range of movement of the furniture parts. This is because detecting the exact position (switching point) of the movable furniture part is not always necessary for the start of the discharge device. Ejection should occur when a user moves a moveable furniture part in one direction or the other direction. This may be signaled by a sensor to start the ejector. However, motion detection does not necessarily lead to detection or consideration of the exact position of furniture parts.

  According to a further design of the invention, the movable furniture parts are held in a closed position under a spring load and can be moved both in and out of the furniture body to start the discharge device It has become. Therefore, the start-up of the discharge device can be performed intuitively by the user. This is because the furniture parts can be pressed and pulled to start the ejector drive. Of course, if no handle element is provided, for example, it is also possible to carry out the start-up of the discharge device when the movable furniture part is pressed.

  In order to be able to perform some kind of tolerance compensation by the sensor, the feeler is preferably applied to a movable piece of furniture under a spring load. Thus, the feeler can move with movable furniture parts before being in the closed position, and its movement is detected by a sensor coupled to the feeler.

  An optical sensor is preferably provided for detecting movement of the feeler. This allows for particularly sensitive detection, the sensor can have at least one raster film movable relative to the light barrier, and the pulses can be converted into control signals by movement of the raster film. The feeler can also be coupled to a toothed rack, with which the raster disk placed on the light barrier can be rotated.

  According to a preferred design of the invention, the sensor and the discharge device are arranged on the back wall of the furniture body, and the discharge device comprises a pivotable lever. The discharge of the movable furniture part is carried out by other drive means, for example an electric drive, a spring element or other drive means that can operate the movable furniture part. Also good. However, a discharge device with a pivotable lever has the advantage that it can be placed on the back wall of a compactly constructed furniture body.

  The sensor feeler is preferably located off the center of the drawer back wall. This is because when the drawer operates in the lateral direction of the front panel, the drawer may be twisted and no start-up will occur if the feeler is centered. It is therefore advantageous if the feeler is not located in the central area of the drawer. If a particularly wide drawer is moved by the drive unit, for example, two sensors spaced apart from each other can be arranged adjacent to the movable furniture part.

  Hereinafter, the present invention will be described in detail based on a plurality of exemplary embodiments with reference to the accompanying drawings.

  A piece of furniture 1 includes a box-shaped furniture main body 2 on which one or more drawers 3 are movably held. For this purpose, an extension guide 4 is provided in the lateral direction of the drawer 3 and is attached to a specific side of the furniture body 2.

  The drive device according to the present embodiment includes a discharge device 6 and a sensor 7, and is provided adjacent to the back wall 5 of the drawer 3. The sensor 7 is attached to the back wall 8 in the main body 2 of the furniture, while the discharge device 6 is held by a vertical bracket 9, and electric wiring is guided to the vertical bracket for power supply. The bracket 9 is coupled to a horizontal bracket 10, which can also be used for power supply.

  2 and 3 show the position in which the drawer 3 is slightly opened. The back wall 5 is provided with a pin 11 projecting rearward, and the pin has a mark or opening that works together with the optical sensor 7. The sensor 7 includes a housing 12, and a light barrier 13 is provided in the housing. When the pin 11 moves through the light barrier 13, a pulse is output to the control device and the control device detects whether the drawer 3 is moving. In addition, the position of the drawer 3 can also be detected.

  If the drawer 3 is in the closed position, no signal is output by the light barrier 13 because the pin 11 is in the rest position. Only when the user pushes the drawer 3 into the furniture body 2 or pulls the drawer out of the furniture body 2 so that the discharge device 6 can be activated after detecting one or more pulses, the pin 11 and the light Relative motion occurs with the barrier 13. Next, the pivotable lever 14 in the discharge device 6 is pressed against the back wall 5 of the drawer 3 to support the extension movement. The lever 14 is then moved to the starting position by the drive, or the back wall 5 pushes the lever 14 back to the starting position during return. When closing the drawer, the pin 11 is moved back into the light barrier 13 and the light barrier detects the movement of the drawer 3 and confirms that it is in the rest position when no further pulses are generated by the movement of the pin 11. To do. The ejector 6 is only activated upon another movement of the pin 11.

  Not only does the recognized movement start the ejector 6, but rather the controller determines whether the recognized movement should result in a start according to a predefinable criterion. The movement that occurs when closing the drawer 3 should not cause a start. The intended movement that occurred last time that resulted in the discharge by the drive is recognized by the controller. Thus, the subsequently recognized return movement does not trigger another discharge. Only the next recognized movement that meets the predetermined criteria (number of pulses, time, etc.) will start the ejector 6 again.

  FIG. 4 shows a piece of furniture according to a modified embodiment, but identical elements are given identical reference numerals. In this embodiment, a modified sensor 7 ′ is provided on the back wall 8 and the sensor is arranged on the other side of the discharge device 6. This indicates that the discharge device 6 and the sensor 7 'can be arranged independently of each other. The control pulse by the sensor 7 or 7 ′ only needs to be transmitted to the control device of the discharge device 6.

  FIGS. 5 and 6 show an embodiment in which the movable drawer 3 can be moved to an open position by the discharge device 6. The sensor 7 'is provided for position detection and does not engage directly with the drawer 3, but rather engages a bracket 17 attached to the floor 18 of the drawer. However, the movement of the drawer 3 can be detected using the sensor 7 '. The sensor 7 'can also be provided on the side wall instead of on the floor 18 of the drawer 3.

  In the embodiment shown in FIGS. 7 and 8, only the sensor 7 'provided adjacent to the back wall 5 of the drawer 3 is shown. The design of the sensor 7 'is shown in detail in FIGS.

  The sensor 7 'includes a housing 20, and a sensor 21 is movably attached to the housing. The sensor 21 is coupled to a toothed rack 22, and the toothed rack is held by the housing 20 via a spring 23. When the back wall 5 of the drawer 3 moves to the closed position, the back wall presses the feeler 21 and the spring 23 and the toothed rack 22 moves with the drawer 3.

  The teeth 24 of the toothed rack 22 engage with a gear 25 which is coupled to a raster disk 26. Due to the rotation of the gear 25 and the raster disk 26, the movement of the toothed rack 22 can be detected by the light barrier 28. Next, the light barrier 28 outputs the detected pulse via the wiring to the control device. A passage 29 is formed in the housing 20 for wiring.

  The sensor 7 ′ may have a laterally projecting flange 30 for easy attachment to the housing 20. Some tolerance compensation occurs automatically through the spring loaded attachment of the toothed rack 22. The reason is that the final position of the drawer 3 can be detected via the movement path of the toothed rack 22, and the toothed rack can nevertheless be located in a specific range of the movement path. This is because it is not necessary to match the switching point. In addition, the resolution can be kept particularly fine by the transmission of movement by the gear 25 and the raster disk 26, and a small movement of the drawer 3 is detected to start the start.

  FIG. 12 schematically shows a sensor 7 according to yet another design, in which a light barrier 70 is provided, which is arranged in a U shape around two raster films 71 and 74, the raster film 71 being a dark band. 72 and a band 73 that transmits light, while the raster film 74 has a bright band 75 and a dark band 76. A pulse is generated at the light barrier 70 by the movement of the raster films 71 and 74 relative to each other, and the pulse can detect the movement of the raster film and the feeler 11 or 21 coupled thereto. Instead of the two raster films 71 and 74, only one raster film can be moved through the light barrier 70.

  In the example shown, optical sensors 7, 7 'are used to detect the movement of the drawer. Of course, it is also possible to use a magnetic sensor or other sensor to detect the movement or position of the drawer. If position detection is to be performed, this can be easily performed by counting pulses.

It is the perspective view which showed the furniture of one point which has the drive device by this embodiment. A slightly open position is shown for the piece of furniture in FIG. FIG. 3 is a detailed view showing the driving device of FIG. 2. Fig. 2 shows a piece of furniture according to a slightly modified embodiment. FIG. 6 is a side view of a piece of furniture having a drive according to a modified embodiment. Fig. 6 shows a detailed view of the drive device of Fig. 5; It is detail drawing which showed the sensor of the drive device provided with the drawer | drawer by this embodiment. FIG. 8 is a detailed view showing the sensor of FIG. 7. It is one figure which showed the sensor of the drive device. It is another figure which showed the sensor of the drive device. It is another figure which showed the sensor of the drive device. It is the schematic diagram which showed the modified sensor.

Claims (10)

A drive device for a movable furniture part (3), such as a drawer in particular, having a discharge device (6), with which the movable furniture part (3) is closed At least partially open from a closed position and further comprising at least one sensor (7, 7 '), with which the movement of the discharge device (6) can be started In the drive device,
The at least one sensor (7, 7 ') comprises a feeler (11, 21) that presses the movable furniture part (3) at least in the closed position, and is used to start the ejector The movement of the furniture part (3) can be detected by the touch device (11, 21) .
Movement of the feeler (11, 21) over a predetermined path distance can be detected by the sensor (7, 7 ′);
Drive device, characterized in that the sensor (11, 21) of the sensor (7, 7 ') is arranged off-center on the back wall of the movable furniture part (3) . The movable furniture part (3) is held under spring load in the closed position and can move in and out of the furniture body to start the discharge device (6). The drive device according to claim 1 . Driving said feeler (11, 21) is, according the relative movable furniture part (3), in any one of claims 1-2, characterized in that it is pressed by spring load apparatus. Wherein the sensor (7, 7 ') is, at a distance from the discharge device, driven according to any one of claims 1 to 3, characterized in that attached to the body (2) of the furniture apparatus. Optical sensors (7, 7 ') is, the driving device according to any one of claims 1 to 4, characterized in that provided in order to detect the movement of the feeler (11, 21) . 6. Driving device according to claim 5 , characterized in that the sensor (7) has at least one raster film (71, 74) movable relative to the light barrier. The sensor (21) is coupled to a toothed rack (22), and the raster disk (26) disposed on the light barrier (28) is rotatable using the toothed rack. The drive device according to any one of claims 1 to 6 , wherein the drive device is characterized. The sensor (7, 7 ') and the discharge device (6) are arranged on the back wall (8) of the furniture body (2), and a lever (14) to which the discharge device (6) can pivot is provided. drive device according to any one of claims 1 to 7, characterized in that it comprises. Two of the sensors spaced from one another (7, 7 ') is any one of claims 1-8, characterized in that it is disposed adjacent to the part (3) of the movable furniture The drive device described in 1. The drive device according to any one of claims 1 to 9 , wherein the touch device (11) has a mark and is provided as a pin fixed to the back wall (5) of the drawer.

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